Clapper box



Feb. 7, 1933. R T, HAYZELTON 1,896,360

CLAPPER BOX Filed July 8, 1929 By fiwyz/d m XZZW M ATTORNEYS.

Patented Feb. 7, 1933 UNITED; STATES,

OFF-ICE ROBERT T. HAZEL'ION, or CINCINNATI, onio, Assisnon TO THE omoinnarrsnnrnn YCOMPANY, or CINCINNATI, 01110, A oo PoRATIoNon o iro CLAPZPER Box Application filed July' 8, 1929. Serial No. 376,679.

My invention relates to clapper boxes as employed with traversing machines such as shapers and planers, in which the boxes are employed to retain a tool in working position against a piece of work while traversing across it in one direction, and to permit the tool to pass idly over the surface ofthe work while traversing in the other direction.

Various expedients have been adopted in the structure of planers and shapers to the end of assuring a firm seat fully protected against strains in all directions for the clappers that hold the tools in the boxes. In

most of these the clapper is provided with a seat between side bars of the box that supports it, and in addition, some kind of seat which will take up vertical thrust.

It is the object of my invention to provide for a seating method ior'clappers which will be easy to arrange, strong in its action, and

makes it unnecessary to machine either the box or the clapper in order to provide for theseveral seats. It is a further object to provide for a simple method of pivoting the clapper boxon the saddle.

I accomplish my object by that certain construction and arrangement of parts to be hereinafter more specifically pointed out and claimed.

In the drawing Figure 1 is a side elevation partly broken away of the clapper and part of the box.

Figure 2 is a front elevation of the same.

Figure 3 is an assembly view showing the saddle and clapper box mounting.

Figure 4 is a bottom plan view illustrating the seating structure of the clapper in the box.

The clapper box isshown at 1, with the clapper 2, said box having a post 3 in which the tool i is held in the usual manner. The box has the usual side rails 5, 5, and the clapper is swung on the pivot bolt 6, so that it lies, when in working position, between the side rails. 7

It is not necessary to provide for a careiul fit with machined surfaces of great accuracy between the side rails and the sides of the clapper, nor is it necessary to provide ridges for strains on the tool in all in the box and shoulders on engaging them. 7 1

Instead of this I provide, in the two lower corners of the box, for the mountingiof two hardened bushings 6a, 6a, said bushings having conical recesses in them facing outwardly.

.Formed on the two lowercorners of the clapper are a pair of heavy lugs orposts 7, 7, which project inwardly therefromand are ground to a careful fit within the'bushings, the ends which fit into the bushings being indicated at 8. f 1 Q Other ways of providing for the portions on the clapper box which-fit within the bushmgs may be provided, and also the bushings themselves, which have the advantage of being replaceable, couldbe eliminated and the conical cavities bored and ground within the saddle.

the, clapper for It will be noted that in use whenthe tool I is being employed in cutting, the clapper box will have two conical seats which will provide directions, and that upon the return stroke of the clapper box or of the work (in planers) the box can swing easily out of the seated positionsothat the tool will drag freely over the work.

I find that the seating arrangement so pro vlded is very-effective, which would not be the case in a singlerecess, and it has-the advantage of being both repairable and replaceable, which is not the case with other seating arrangementswith which I am fainiliar.

.The clapper box, as is normal practice, is

pivoted to the saddle 9 so that it can beswung on a horizontal pivot. The slotted'head 10 of the clapper box is'of usual structure. The I novel arrangement is themode of pivoting the box. To this end a conical po'st ll is formed on the center ofthe'lower end of the back of the box, which post is developed at its end intoa threaded cylindrical portion 12 to receive the nut 13. A conical recess 14 is formed in the saddle. The post and recess may, however, be cylindrical.

'Whenthe box is mounted the post is seated in the recess and the nut turned down" to draw the box snugly into place, although not so "tightly that it cannot be swung around.

soc

V the lines of the This structure is simple and at the same time, strong and sturdy.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a clapper structure, the combination of a clapper box, a clapper, means for pivoting the clapper to the clapper box, said clapper and box being characterized by a pair of conical recesses and coacting conical projections adjacent the lower end thereof and in terspaced in a direction transverse to the axis of said clapper and box, said conical projections being of sufficient length to hold said clapper positively a substantial distance away from said clapper box, said conical projections and recesses forming the sole seating means for said clapper with respect to said clapper box.

2. In a clapper structure, the combination of aclapper box, a clapper, means for pivoting the clapper to the clapper b0X,,said clapper and box being characterized by a pair of conical recesses and coacting conical projections adjacent the lower end thereof and interspaced in adirection transverse to the axis of said clapper and box, said conical projections being of sufiicient length to hold said clapper positively a substantial distance away from said clapper box, said conical projections and recesses forming the sole seating means for said clapper with respect to said clapper box, said clapper'bearlng a tool holding means located substantially on the axis of said clapper and substantially above a line drawn through the centers of said conical projections.

3. In a clapper structure, the combination of aclapper box, a clapper, means for p voting said clapper to said box substantlally at the upper end of said clapper,sa1d box being wider than said clapper and charac terized by at least a pair of horizontally interspaced conical recesses, said clapper having a pair of conical projectlons ad acent the lower end thereof extending toward said clapper box and interspaced to coact with said depressions, said pro ectionsbelng of sufficient length to maintain said clapper a substantial distance away from said clapper box, whereby said structure becomes self compensating for wear, the bodles of said projections extending substantially beyond edges of the body of said clapper.

4. In a clapper structure, the combination of a clapper box, a clapper, means for pivot-.

ing said clapper to said box substantially at the upper end of said clapper, sand box being wider than said clapper, and said clapper and box being characterized by at least a pair .of horizontally interspaced conical recesses and coacting conical projections adjacent the lower end thereof, said projections beingof suflicient length tomaintai'n wsaid clapper a substantial distance away from said clapper box, whereby said structure becomes self compensating for wear, the pair of said members located 011 said clapper extending substantially beyond the lines of the edges of the body of said clapper, and a tool post located on said clapper substantially upon the axis thereof.

5. In a clapper structure, the combination of a clapper box, a clapper, means for pivoting said clapper to said -box substantially at the upper end of said clapper, said box being wider than said clapper, and said clapper and box being characterized by at least a pair of horizontally interspaced conical recesses and coacting conical projections adj acent the lower end thereof, said projections being of suflicient length to maintain said clapper a substantial distance away from said clapper box, whereby said structure becomes self-compensating for wear, the pair of said members located on said clapper extending substantially beyond the lines of the edges of the body of said clapper, and a tool post located on said clapper substantially upon the axis thereof, the center of said tool post being located substantially above a line drawn between the centers of said pair of members. I

6. In a clapper structure, the combination of a clapper box, a clapper, means for pivoting the clapper adjacent its upper end to the clapper box, seating means for the clapper with respect to said box comprising solely a pair of conical depressions widely interspaced, and a pair of co-operating conical projections to engage in said recesses, said conical projections and recesses located respectively on said clapper and box, said projections being of suificient length to maintain said clapper a substantial distance away from said clapper box, whereby said seating means is self-compensating for wear, and tool-holding means located on said clapper intermediate its upper end and said projections.

ROBERT T. I-IAZELTON. 

